Image: Edmond Valerio
Sand dunes are some of the world’s great natural wonders. Formed by winds that sculpt their spectacular shapes, they provide needed coastal protection from ocean waves whipped up in storms. Some of the most spectacular, such as those found in Sossusvlei, Namibia, were formed thousands if not millions of years ago, when there were ancient lakes and seas in areas now inland. We have gathered some of the most spectacular photos of sand dunes we could find for your enjoyment.